Rubber substitute and process of making the same.



UNITED STATES PATENT orrrcu.

SADAKICHI SATOW, OF SENDAI, JAPAN.

RUBBER SUBSTITUTE AND. PROCESS OF MAKING THE SAME.

No Drawing.

To all whom it may concern:

Be it known that I, SADAKICHI SATOW, a subject of the Emperor of Japan, residing at Sendai, Japan, have made a certain new and useful Invention in Rubber Substitute'and Processes of Makin the Same,of which the following is a speci cation.

This invention relates to rubber substitute having the properties of rubber and the process of making the same.

The objectof the invention is .to provide a substitute for rubber, and an economical process for making the same.

A further object of the invention is to provide a rubber substitute which may be used for all purposes for which rubber is adapted, and which is made from vegetable proteidal substances.

Further objects of the invention will appear more fully hereinaften.

The methods heretofore proposed for the manufacture of rubber substitute are open 'to many and serious objections. The products of the' methods heretofore proposed have in many instances fallen far short of.

the desired efficiency as suitable rubber substitutes because of their failure to possess one or more of the desirable characteristics of rubber. Again, the proposed methods, in many instances, have proven expensive and ineflicient because of the time required in carrying them out and the nature of the ma terials employed, and the inability to properly and easily control the degree of hardness or softness of theproduct.

It is among the special objects of my present invention to provide a substitute for rubher, and a process of making the same, which avoids the ob'ections referred to and which product is di cultly inflammable, can

be quickly, easily and economically made and rolled into any desired thickness or otherwise formed or molded into any desired shape, with any desired degree of hardness or softness and having the desirable characteristics of elasticity, flexibility and strength of rubber.

In carrying out my invention I employ vegetable proteids or proteidal substances which are glutinized with suitable agents into a sticky viscid mass. This mass may be used as a coating for cloth, textile, or other Patented Nov. 6, 1917.

Application file d December 11, 1916. 1 Serial No. 136,299.

fabric, either with or without vulcanization or it may be transformed into proteidal con densation products by the action of an active methylene compound, and rolled into sheets or molded into form, or applied tothe fabric and vulcanized; or to the glutinized mass, whether or not treated with the active methylene compound, may be added a suitable vulcanized oil and the mass may I then be applied to a fabric or molded or rolled into sheets or other form, for,use'as an artificial rubber. Suitable pigments or coloring mattermay also be employed, as well as diflicultly drying substances such as oxidized oils, triphenyl-glycerin, or the like.

The proteids are procured from any suitable raw proteid containing material such as beans, peas, wheat, corn or other leg'uminous cereal or grain products. j

The proteid containing raw material is crushed to break down the cellular structure thereof, and if .it' contains an undesirable percentage of oil, the oil content is removed. This may be effected in any suitable manner, as, for example, by treating the mass with an oil solvent such as benzm. The oil solvent is then removed from the mass. The proteidal substances contained in the meal or proteid meal thus produced, are sepaprecipitation, fractional solution of precipitated impure proteids, or by converting oneor more components into other chemical compounds having different properties which enable their separation to be effected, or one or more of these various purifying methods may be employed in combination with the others. The precipitation of the refined proteidal substances is accomplished by adding a suitable acid, such as sulfuric,

' tion, centrifuging, .or the like, by fractional 1 The protei al substances obtained as i "above described are suitable and highly efacid, cresol, resorcin,

ficient for use in making rubber substitute in accordance with my invention.

In the preparation of the rubber substitute the proteidal substances, obtained as above described, are subjected to the action of a glutinizing agent to produce a sticky viscid mass. T have found the following to be suitable proteidglutinizing agents, namely, (1) inorganic acids such as phosphoric, sulfurous acidand the like; or (2) fatty or oxy-fatty acids, such as formic, acetic, propionic, phenyl-propionic, malonic, lactic, tartaric, citric, make, and the like; or (3) aromatic acids such as salicylic, benzoic, or the like;

nitro-cresol, and the like; or (5) organic bases, such as pyridin, urea, glycin, anilin, naphthylamin, or other amino compounds or the like; or (6) inorganic bases such as caustic alkali, or am-- monia; or (7) alkali salts of weak acids, such as borax, sodium phosphate, and the like.

- The properties of which particularly manufacture of rubber greatly improved if one or more of the following compounds are added thereto, namely, 'diflicultly drying sticky or viscid substances, such as oxidized oils, triphenylglycerin, or the like; or active methylene compounds, such as formaldehyde, hexamethylene-tetramin, trioxymethylene, or other aldehydes of aliphatic and aromatic series.

' The properties of the mass thus obtained are still further improved if a small quantity of alkali is added thereto.

To the mass, obtained as above described, is added a suitable vulcanized oil, such as vulcanized castor oil, vulcanized soja bean oil, vulcanized corn oil, or the like.

If desired, and in order to: form a body the mass thus obtained adapt it for use in the substitute, 'are ,for and to increase the tensile strength of the rubber substitute product, suitable fibrous material, such as waste hemp, cott wood fiber, paper, or other similar materia preferably though not necessarily, possessare precipitated out of the result-.

or (4) phenols, such as carbolic g be easily rolled into sheets of any aaeaere ing a long strong fiber is added. Also, if desired, any suitable ient or coloring matter may also be ad e.

The manner in which m invention is carried out is illustrated in t e following illustrative examples.

Example 1. The refined roteidal substances, procured as describe are kneaded with cresol, and the mass is kneaded again after the addition of oxidized castor oil. The resulting mass is kneaded a third time after' addin thereto a small quantity of concentrate caustic soda solution, and a suitable quantity of vulcanized castor oil. Finally the mass is rolled hot, or molded, to the desired thickness, size or form.

Example 2. The proteidal substances either in the crude or refined state, are

hieaded first with nitro-ph-enol, and the mass is again kneaded successively with trioxymethylene and caustic soda, and vulcanized castor oil, and the resulting mass is applied under a hot roller to cotton cloth or other fabric, and dried.

It is to be understood, of course, that my invention in its broadest scope, as defined in. the claims, is not to be limited to 'the use of any particular raw material containing vegetable proteids, nor to any particular method of recovering or refining the proteidal substances, nor to any particular lutinizing agent, nor to any particular condensing agent or difiicultl drying substance, nor to any particular vu canized oil. It is also to be understood that in carryin out my invention the roteids may be emp oyed either in their re ned or crude state.

The rubber substitute'produced as above described is dificultly inflammable. It can desired thickness or size or molded into an desired form, or applied easily, readily and quickly to any suitable cloth or fabric. It is strong, elastic, flexible, tenacious, durable and economical, and can be used 1n any situation or finished article where rubber or rubber substitute is now used. By suitably varying the proportion of glutinizing or condensing canized oil' with a glutinized mass, and then 7 forming the resulting mass into a sheet.

2. In the manufacture of rubber substi I tute the process which consists in glutinizing vegetable proteids with a phenol and then mixing a vulcanized oil with the glutinized mass.

3. In the manufacture of rubber substitute the process which consists in glutinizing Vegetable proteids then adding a sticky viscid agent and a vulcanized oil to the glutinized mass and finally forming the resulting mass into a sheet.

4. In -the manufacture of rubber substitute the process which consists in glutinizing vegetable proteids then adding a sticky viscid agent to the glutinized mass, and finally adding vulcanized castor oil to the mass.

5. In the manufacture of rubber substitute the process which consists in glutinizingyegetable proteids with a phenol, and

mixing a vulcanized oil in the glutinized mass and then forming the resulting mass into a sheet.

6. In the manufacture of rubber substitute the process which consists in glutinizing vegetable proteids with a phenol, and then mixingvulcanized castor oil with the glutinized mass.

7. In the manufacture of rubber substitute the process which consists in glutiniz- .ing vegetable proteids with a phenol, and

then mixing a sticky viscid agent and a vulcanized oil to the glutinized-mass.

8. In the manufacture of rubber substitute the process which consists in glutinizing vegetable proteids with a phenol, then mixing a sticky viscid agent with the glutinized mass, and finally mixing vulcanized castor oil with the mass.

9. In the manufacture of rubber substi tute the process which consists in glutinizing vegetable proteids, and mixing an active methyelene compound and a vulcanized oil with the glutinized mass.

10. In the manufacture of rubber substitute the process which consists in glutinizin vegetable proteids, and mixing an active methylene compound and vulcanized castor oil with the glutinized mass.

11. In the manufacture of rubber substitute the process which consists in glutinizing vegetable proteids, and mixing a sticky viscid agent, an active methylene compound and a vulcanized oil with the glutinized mass.

- 12. In the manufacture of rubber substitute'the process which consists in glutinizing vegetable proteids with a phenol, and I mixing a sticky viscid agent, an active methylene compound and a vulcanized oil with the glutinized mass.

13. In the manufacture of rubber substitute the process which consists in glutinizing vegetable proteids with a phenol, and

mixing an oxidized oil and a vulcanized oil to the glutinized mass. I 14. In the manufacture of rubber substitute the process which consists 111 glutinizfibrous material and a vulcanized oil to'the glutinized mass.

17. In the manufacture of rubber substitute the process which consists in glutinizing vegetable proteids and then mixing a sticky viscid agent and an active methylene compound and vulcanized-castor oil with the glutinized mass.

18. In the manufacture of rubber substitute the process which consists in separating the vegetable proteids from proteid containing material, then glutinizing the separated vegetable proteids and mixing a vulcanized oil with the glutinized mass.

19. In the manufacture of rubber substitute the process which consists in separating in a liquid the vegetable proteids of proteid containing raw material, then precipitating the proteidal substances from the liquid and glutinizing the precipitated vegetable proteidal substances and adding a vulcanized oil to the glutinized mass.

20. As a new article of manufacture, rubber substitute consisting of glutinized vegetable proteidal substances having vulcanized oil incorporated in the glutinized mass.

21. As a new article of manufacture, rubber substitute consisting of glutinized vegetable proteidal substances containing an active methylene compound and vulcanized oil.

22. As a new article of manufacture, rubber substitute consisting of glutinized vegetable proteidal substances containing an active methylene compound and vulcanized castor oil.

23. As a new article of manufacture, rubber substitute consisting of glutinized vege table proteidal substances containing an oxidized oil and a vulcanlzed 011.

24. As a new article of manufacture, rub-- ber substitute consisting of glutinized vegetable proteidal substances containing a difficultly drying agent and avulcanized oil.

25. As a new article of manufacture, rubber substitute consisting of glutinized vegetable proteidal substances, an active methylene agent, an oxidized oil ized oil.

27. The process of manufacturing ruband a vulcanber substitute which consists in glutinizing vegetable proteids with a proteid glutinizing agent and then adding a vulcanized oil.

28. 'ln'e process of manufacturing rubber substitute which consists in glutinizing vegetable proteids with a proteid glutmizinig agent and then vulcanizing the mass.

29. Ihe process of manufacturing rubber substitute which consists in glutinizing vegetable proteids with a phenol and then vulcanizing the mass.

30. In the manufacture of rubber substitute the process Which consists in glutinizing vegetable proteid substances, then treating the glutlnized mass with an active methlyene compound and an alkali and finally vulcanizing the mass.

31. In the manufacture of rubber substitute the process which consists in glutinizing vegetable proteid substances, then treat- 'tinized nae a ate ing the glutinized mass with an oxidized oil, an active meth lene compound and an alkali, and finally vu canizing the mass.

32. In the manufacture of rubber substitute the process which consists in treating vegetable proteid substances with a phenol, an active methylene compound and an alkali, and adding fibrousmaterial to the glumass and finally vulcanizing the mass.

33, In the manufacture of rubber substitute the process which consists in treating glutinized vegetable proteid substances with a phenol, an oxidizing oil, an active methylene compound and an alkali and finally vulcanizing the mass.

In testimony whereof I have hereunto set my hand on this 1st .day of December A. D.

SADAKICHI SATUW. 

